德尔福XE3 DLL注入64位DLL到64位进程不起作用

Question

>我正在使用此代码将我的 64 位 dll 注入 Windows 64 上的 64 位进程 7 位，CreateRemoteThread 返回 200 但仍然没有注入 dll，我用另一个来源测试了我的 dll，它工作正常，进程资源管理器显示我的代码不起作用，这段代码可能有什么问题，我正在使用 delphi XE3 并且我已经在 64 位目标平台上编译了代码。

function InjectDLL(dwPID: DWORD; DLLPath: pwidechar): integer;
var
dwThreadID: Cardinal;
hProc, hThread, hKernel: NativeUInt;
BytesWritten: NativeUInt;
pRemoteBuffer, pLoadLibrary: Pointer;
begin
try
hProc := OpenProcess(PROCESS_ALL_ACCESS, False, dwPID);
if hProc = 0 then
begin
  Result := 0;
  Exit;
end;
pRemoteBuffer := VirtualAllocEx(hProc, nil, Length(DLLPath) + 1, MEM_COMMIT,
  PAGE_READWRITE);
if pRemoteBuffer = nil then
begin
  Result := 0;
  Exit;
end;
if WriteProcessMemory(hProc, Pointer(pRemoteBuffer), lpvoid(DLLPath),
  Length(DLLPath) + 1, BytesWritten) = False then
begin
  Result := 0;
  Exit;
end;
hKernel := GetModuleHandle(pwidechar('kernel32.dll'));
pLoadLibrary := (GetProcAddress(hKernel, pansichar('LoadLibraryA')));
hThread := CreateRemoteThread(hProc, Pointer(nil), 0, Pointer(pLoadLibrary),
  Pointer(pRemoteBuffer), 0, dwThreadID);
WaitForSingleObject(hThread, INFINITE);
VirtualFreeEx(hProc, Pointer(pRemoteBuffer), Length(DLLPath) + 1,
  MEM_RELEASE);
CloseHandle(hThread);
CloseHandle(hProc);
// ShowMessage(IntToStr(hThread)+' '+ inttostr(dwThreadID));
Result := 1;
except
on d: exception do
begin
end;
end;
end;

Answer 1

您正在调用 LoadLibraryA ，但向其传递 UTF-16 编码数据。切换到LoadLibraryW或将模块名称转换为 ANSI。

我会做前者。以及切换到 LoadLibraryW ，您需要复制整个缓冲区。通过将两个Length(DLLPath) + 1实例替换为 SizeOf(Char)*(Length(DLLPath) + 1) 来实现这一点。

更多评论：

• 使用PROCESS_ALL_ACCESS是过度的。你只需要PROCESS_CREATE_THREAD or PROCESS_QUERY_INFORMATION or PROCESS_VM_OPERATION or PROCESS_VM_WRITE or PROCESS_VM_READ.
• GetProcAddress(hKernel, pansichar('LoadLibraryA'))中的PAnsiChar看起来不对劲。因为'LoadLibraryA'是 UTF-16 编码的。只需使用GetProcAddress(hKernel, 'LoadLibraryA').或者'LoadLibraryW'如果你沿着这条路走下去。
• 将 NativeUInt 用于句柄是错误的。这实际上并不重要，但您应该使用 THandle .
• 使用 MEM_RELEASE 时，必须传递 size 参数的0。

把这些放在一起，代码应该看起来像这样：

function InjectDLL(dwPID: DWORD; DLLPath: PWideChar): integer;
var
  dwThreadID: Cardinal;
  hProc, hThread, hKernel: THandle;
  BytesToWrite, BytesWritten: SIZE_T;
  pRemoteBuffer, pLoadLibrary: Pointer;
begin
  hProc := OpenProcess(PROCESS_CREATE_THREAD or PROCESS_QUERY_INFORMATION or PROCESS_VM_OPERATION or PROCESS_VM_WRITE or PROCESS_VM_READ, False, dwPID);
  if hProc = 0 then
    exit(0);
  try
    BytesToWrite := SizeOf(WideChar)*(Length(DLLPath) + 1);
    pRemoteBuffer := VirtualAllocEx(hProc, nil, BytesToWrite, MEM_COMMIT, PAGE_READWRITE);
    if pRemoteBuffer = nil then
      exit(0);
    try
      if not WriteProcessMemory(hProc, pRemoteBuffer, DLLPath, BytesToWrite, BytesWritten) then
        exit(0);
      hKernel := GetModuleHandle('kernel32.dll');
      pLoadLibrary := GetProcAddress(hKernel, 'LoadLibraryW');
      hThread := CreateRemoteThread(hProc, nil, 0, pLoadLibrary, pRemoteBuffer, 0, dwThreadID);
      try
        WaitForSingleObject(hThread, INFINITE);
      finally
        CloseHandle(hThread);
      end;
    finally
      VirtualFreeEx(hProc, pRemoteBuffer, 0, MEM_RELEASE);
    end;
  finally
    CloseHandle(hProc);
  end;
  exit(1);
end;

就我个人而言，我可能会通过一个string而不是一个PWideChar，但也许你还有其他动机这样做。